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45鋼零件發(fā)黑容易生銹怎么破,? |
點(diǎn)評(píng)
關(guān)鍵是小廠還沒經(jīng)過煮鹽,,都是淘寶直接買的發(fā)黑藥水,,泡幾分鐘撈出來的
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點(diǎn)評(píng)
防銹能力還可以
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